Charles Williams Barber (September 21, 1872 – January 7, 1943) was an army officer and an American Brigadier general active during World War I.

He attended Pierce Business College in Philadelphia before studying law in the office of H.S.

From 1908 to 1915, Barber was with the Panama Canal Commission and retired as a major, Third Infantry, on September 1, 1916.

He then served on the Mexican border, after which he became the adjutant general of New Jersey from December 1916 to July 1917.

He was a General Staff officer and also commanded Base Section Number 2 in Bordeaux until July 1919.